2020年6月
Very sharp diffraction peak in nonglass-forming liquid with the formation of distorted tetraclusters
NPG Asia Materials
- 巻
- 12
- 号
- 1
- 開始ページ
- 43-1
- 終了ページ
- 43-11
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41427-020-0220-0
- 出版者・発行元
- NATURE PUBLISHING GROUP
Understanding the liquid structure provides information that is crucial to uncovering the nature of the glass-liquid transition. We apply an aerodynamic levitation technique and high-energy X-rays to liquid (l)-Er(2)O(3)to discover its structure. The sample densities are measured by electrostatic levitation at the International Space Station. Liquid Er(2)O(3)displays a very sharp diffraction peak (principal peak). Applying a combined reverse Monte Carlo - molecular dynamics approach, the simulations produce an Er-O coordination number of 6.1, which is comparable to that of another nonglass-forming liquid,l-ZrO2. The atomic structure ofl-Er(2)O(3)comprises distorted OEr4 tetraclusters in nearly linear arrangements, as manifested by a prominent peak observed at similar to 180 degrees in the Er-O-Er bond angle distribution. This structural feature gives rise to long periodicity corresponding to the sharp principal peak in the X-ray diffraction data. A persistent homology analysis suggests thatl-Er(2)O(3)is homologically similar to the crystalline phase. Moreover, electronic structure calculations show thatl-Er(2)O(3)has a modest band gap of 0.6 eV that is significantly reduced from the crystalline phase due to the tetracluster distortions. The estimated viscosity is very low above the melting point forl-ZrO2, and the material can be described as an extremely fragile liquid.
- リンク情報
-
- DOI
- https://doi.org/10.1038/s41427-020-0220-0
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000540154700001&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85085865321&partnerID=MN8TOARS
- ID情報
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- DOI : 10.1038/s41427-020-0220-0
- ISSN : 1884-4057
- ISSN : 1884-4049
- eISSN : 1884-4057
- ORCIDのPut Code : 119518999
- SCOPUS ID : 85085865321
- Web of Science ID : WOS:000540154700001